Guides · Testing
Choosing a Home Water Test Kit
Strips, meters and mail-in labs — which tool answers which question, and when a cheap kit is the wrong instrument.
Match the tool to the question
There are three tiers: test strips for quick screening, electronic meters for specific parameters, and certified laboratory analysis for decisions about health.
The mistake is using a cheap tool for a serious question. Strips are excellent for confirming that a softener is working and poor for deciding whether your well water is safe for an infant.
Test strips
Useful for: hardness, pH, chlorine, and rough nitrate screening. Cheap, fast, and easy to repeat — which makes them good for monitoring trends.
Limitations: wide error bands, sensitivity to light and storage, and results that are hard to read between colour patches.
For anything with a legal limit and a health consequence — nitrate, arsenic, lead — confirm with a lab.
Electronic meters
TDS and EC meters measure conductivity, which is a performance indicator rather than a health test. They are excellent for tracking an RO membrane over time.
pH meters need calibration and proper storage; an uncalibrated pH pen is worse than a strip.
Temperature and flow meters are occasionally bundled in; they are useful for diagnosing an RO system rather than for water quality.
Certified laboratory analysis
This is the right tier for bacteria, lead, arsenic, nitrate, PFAS and radiological parameters. The lab supplies a sterile bottle and instructions, and the report carries the numbers you can act on.
Order a package that matches your source: a municipal-supply panel for lead and disinfection by-products, a private-well panel for bacteria, nitrate, arsenic, hardness, pH and metals.
Follow the sampling instructions exactly. A contaminated or delayed sample produces a result about the bottle, not the well.
A practical testing plan
Municipal supply: rely on the CCR yearly, and test your own tap for lead once if the building is older or you have a lead service line.
Private well: full panel at purchase or first occupancy, then bacteria and nitrate annually, and the wider panel every three to five years.
Any supply: retest after flooding, plumbing work, a new well pump, or a change in the water's look or smell.
Keep the reports. A five-year series says far more than a single result.
FAQ
Quick answers
+Are cheap test strips accurate enough for well water?
For screening hardness or pH, usually. For nitrate, arsenic, lead or bacteria, use a certified lab — those results carry health consequences and legal limits.
+Do I need a TDS meter if I have a lab report?
No, they answer different questions. A lab report tells you what is in the water; a TDS meter tracks whether an RO membrane is still performing.
+How often should I test a private well?
Bacteria and nitrate annually, the wider panel every three to five years, and again after any flooding, plumbing work or change in the water's appearance or taste.